Pulverizing mill



Sept. 25,1923. 1,

F. H. WOLEVER PULVERI Z ING MILL Filed Jan. 23, 1920 IN V EN TOR.

A TTORNEYS.

Sept. 25 1923.

F. H. WOLE VER PULYERIZING MILL Filed Jan. 23. who 2 Sheets-Sheet 2 INVENTOR. I T'fzmkZinH. oZez/er ATTORES.

Illllll Patented Sept. 25, 1923.

FRANKLIN I-I. woLEvEa, oson ieseo, ILLINOIS.

Application filed January 23, 1920. Serial No; 353,540.

T 0 all whom it may concern:

Be it known that I, FRANKLIN-H. VVoL- nvnn, a citizen ofthe United States, and a resident of Chicago, in the county of Cook and State oflllinois, have invented certain new and useful Improvements in Pulverizing Mills; and I do hereby declare that the; following is a full, clear, and exact description thereof, reference being had to the ac-'- companying drawings, and to the characters of reference marked thereon, which form a part of this specification. V r n This invention relates to improvements in crushing or pulverizing mills of that character in which granular materials-such as vitreous enamels andlike materials are enclosed in. a barrel, together with crushing, elements, such as balls or weights, so as to grind the material to a powder by the constant tumbling and impactaction of the balls or elements against each other and against the'side of the barrel when the barrel is rotated on its axis. =V'Vhile the mill is primarily designed to be used in the crush ing of enamels in the ceramic and iron and 7 steel enameling art, and has been designed especially for 'such'art, it may be used for crushing and pulveri-Zingother lilce ma te rials. Among the objects ofthe invention is to produce a rotating;barrel mill theinner wall of which comprises planes of vitreous materials, as porcelaimthat are so arranged with respect to each other that the inner.

wall ofthe barrel takes the form of apolygonal cross section with the wall segments spaced at desired angles, as from 90 to 135 degrees, so as to produce-angle breaks between the segments of such extent that the crushingz elements will. upon impactagainst the wall sections. bound across the angles instead of tending to roll around the Wall of the barrel as if it be made cylindric or nearly so. 4 Another object of the invention is to provide a novel multiple section, inner, vitreous wall of a mill barrel, the sections of which are reliably supported by means which avoid the use of interiorlv exposed cement joints or other joints by which d ele terious material will 7 be exposed to the crushed or ground material.

A. further object ofthe invention is to" provide a-novel means of eirteriorly binding together the vitreous segments, slabs or stares and end walls of such a barrel partly l the I invention.

-' through the medium of yielding elements so; as tohold: and support them reliably in place, while at the same time avoiding crushing. pressure on the relative frangibleelements of;

the-barrel due to temperature changes, and also a'fiordmg means for removing aibroken stave or slab and the replacement of'anotherL 1A still further: object of the invention is to provide a crushing or pulverizing mill barrel'whlch is made throughoutwith solid vitreous segments disposed at anglesto mutually support each other and to producer a'polygonal-cross section and of such thick ness as to readily withstand the'impact of the crushing" elements, and" which elements that said'ele are made of such dimensions,

ments continue throughout the di'stance ofa the dimension of the barrel for which the elements are intended, thereby avoiding the use of inner small-tile or brick and the conr sequent inconvenience of 'installingthem and removing injured wall parts.

There is shown: in the drawingsa number of modifications illustrating the structure set forth, said drawings being more or less diagrammaticto ndicate the essent1al ele-fi ments-of-the inventions, and are not intended to 'be limiting with i respect to the" scope of the' drawings V Figure '11s a side view'of a crushing mill embodymg my invention w th" parts 111' sec As shown in tlOl}. V

Figure 2'is a cross section on the line 22 it FifIu-fe 1; a w Figure is a detail ot'one of the ioints'between adjacent stares or ingbarrel. l I r -Figure 4 is a detail "showing one of the perforated d scharge doors of the barrel.

Figure 5 is across section o'n theline '55 ofFigurel; Figure 6 is a detail'illustrating'the screen door th ough which the contents of the barrel of the sample mill are dischargedr Figure '6 is an end view of the mill barrel. Figures 7. 8. 9. and 10 are cross sections of modified grinding barrels;

the pulverizing'mill made up of a plurality of solid slabs or stavesll of vitreous por-v slabs of the crush As shown in Figures 1' to 6- ';"inclusive,-

of the drawings; 10 designates the barrel of.

angles to each other as to give to the ass'em- I bled structure the polygonal interior forms tion set forth. 12 designates a solid, or grinding door to cover the charging and discharging opening of the barrel, and there will be a number of doors to correspond to the number of compartments of the barrel. 13, Figure 4, designates a form of perforated or screen door which is adapted to fit over the door opening of a compartment, and through the perforations of which the crushed material is discharged while avoiding discharge of the crushing elements therewith. These doors will be made of the same material as the staves 11.

14, 14 designate the end walls or heads of the barrel made of vitreous porcelain or the like. They are fitted attheir peripheries in rebates or recesses on the inner sides of the slabs or staves 11, as shown at 15 (Figure 1). Resilient members 16 are interposed between the ends of said slabs 11 and the margins of metal plates 19 fitted outside of the vitreous porcelain heads 14. Said heads 14 and the resilient member 16 may extend between the end walls. 14 and metal heads 19 towards the center of the latter. The peripheries of the metal plate 19 are turned inwardly to form annular flanges 18 which extend radially beyond the staves, as shown in Figure 1, to constitute confining members which cooperate with confining hoops, hereinafter described to exteriorly support the barrel parts. The spaces between said flanges 18 and the staves or slabs may be filled with cement 20 to further exteriorly bond the barrel elements.

The barrel structure is held together by tie rods 22 exterior to the barrel which extend through lugs 23 riveted to the peripheral portions of the metal heads or endplates 19, theparts being clamped together by nuts on the threaded ends of the tierods. The gaskets 16 provide equalizing means on the slabs or staves and the barrel ends due to temperature changes. The construction shown provides a very compact. relatively light. economical and very IlglCl end supports for the barrel.

25 designatehubs fixed to or forming parts of the metal plates or heads 19. They are formed with annular flanges 26 that extend into the larger central openings in the porcelain heads 14 and are bonded thereto at'27 by cement. Said hubs are hollow and are fastened to the central portions of the heads 14'by flanged keys 28 which enter the bores of the hubs-and are bonded thereto at tatively mounted in bearings 36 carried by the upper ends of standards 37 at the ends of the barrel. One of said shafts 35 carries tight and loose pulleys 36 and 37, respectively, whereby the barrel may be rotated. Alternatively a motor or a counter shaft may be geared to said shaft 35. In this manner the barrel is supported on said standards and is free to be rotated in the bearings carried thereby.

The slabs or staves of the barrel are formed at their side edges "with oblique or mite-red meeting faces 40 arranged at such angles to the longitudinal planes thereof as to bring the inner side faces of the slabs at their proper angles relatively to each other for the purpose set forth. Said slabs or staves are locked together at their meeting side edges by key members 41 which are contained in'registering elongating recesses 42, nearer the outer than the inner sides of the slabs, as best shown in Figure 3. Said recesses are larger than the key members and are bonded to the adjacent slabs by cement 43 poured into said recesses after the key members have been fitted in place.

The construction shown and thus described permits the mitered or oblique edges of the slabs to be brought fiatwise together, so thatsaid slabs thereby mutually support eaclrother, but/the principal advantage of this arrangement is that the slabs are bound together by dry joints 46 inwardly beyond the recesses 42, so that thereby bonding cement is not exposed at the joints inside said barrel and liability of injurious contact of cement with the'material being ground is avoided.

The said staves or slabs 11. are shown in Figures 1 and-2 as exteriorly bound together intermediate their ends by a plurality of metal hoops: 48 of such diameter as to engage the corners of said slabsattheir outer angles. Saiclhoops are each made of a single length of strap material that is pro vided at its adjacent endsv with out-turned lugs 49 which are connected by a clamping bolt 50, the hoop extending continuously about the barrel from one of said lugs to the other. I

The grinding and discharge doors 12, 13 are angled at their edges to fit the angled edges of the slabs or staves, as shown in Figures 2 and 4; They are removably mounted on the barrel by being clamped to transverse exterior frame members 52 which extend between and are riveted to adjacent hoops at the sides of the door opening (Figures 1 and 2). Formed on or fixed to said frame members are lugs 54 that are threaded at their outer ends to receivenuts'55. Cross or clamping bars 56 "of T cross sec tion are fitted over the outer faces of the doors and are formed at their ends with mes-gees being clamped againstthe doors by the. nuts;

55. The doors are provided with-handles 58 by which they maybe handled. I

As will be noted by an inspection of "ure 2, the grinding doors are solid porcelain plates, while: in Figure 4c, the discharging.

doors are also made-of like material and are perforated to permit the crushed material; to fall therethrough when the doors areloW ermost in the. barrel. It will thus be seen that the door framesanddoors are so cons structed and applied to the-barrel; that the crushed material has 'novco'ntact W'ith'metal parts, except that which might intercept-the --discharg:i-ng material-by the presence-of the clampingbars 56 and handles 58, the ill-'- jurious tendency ofnwhichais negligible.

As shownin- Figure 2, said hoop=mem bers 48' are spaced from the 'fia-t'oute1r-taces-v "ofthe slabs or staves between: the outer angles of meeting stavesor SL81bS, -by"610IlT gated Wooden lagging- 60, l and the, spaces 7 becharged by'moving the same to .bringthe grinding doors 12' at the top ofthe barrel,-

whereupon; by releasing of 1 the nuts 55' the doors :maybe: removed and'the barrel charged through the, door; openings, whereupon-the grindingdoois areBQphced, The.

discharging-doors may be fitted; to the door openings when the latter are-fat} the top of the barrel, so that when the aIFlQI is-r -P tatedone half around, the crushed material; may: fall-- through the perforations 'ofz the retaining the discharging doors, ,while crushing-balls or elements in the barrel.

When the cylinder or drum; has been charged with the material tobetreated, to:

gether with a suflicient number of lballs or and the barrel rotated so as to cause the balls to float through the mass of the" mate-..

rialbeing treated, and said-material; is re du'cedor crushedto a desired mesh both by the intergrinding -of the particlesl of the,

material upon themselves and the. balls andbecause also ofthe impact eflfectof. the

balls orgcrushing elements against the inner 1" wall of the barrel, the material being caught between moving. crushing elements, and. be-. tweenthe latter and the. interiorvpolygonali wall of the barrel;

By reason of the, fact the segments, p v i or the like to thereby firml'yhold the bar- 1 g that thereby thesaid ballsorrorushing ele ments, movelargely in, straight lines from;

Contact with. one segment t t e inn r t ce of the barrel toanotherv segment; by

reason of'the momentum acquired in; this straight; path moyement 'efiectively crushes:v the material caught between the said balls} or crushing elements and said'segmentfs or faces; This'innerconfigurationofthe drum number of them)1,may'fit;within the barrel in-any suitable manner; As shown, the

greatly hastens the redugtio f thegmaltefl '75 perforate partition r67 so that-two grades .rial maybe operated upon-atthe same time. j

staves or slabs are interiorlygrooved to receive the edges ofj the polygonal partiti'en, and the partition may bef'removed to-"form a larger barrel compartment bybreaking; or

At one end of one, ofthe' shafts 35 is pro- Videdra'ndthereby supported asmaller bar-, rel whichais similar in its interioreom; figuration .to' theflarger barrel sh0w-n,.-With the exception that, asherein shown, the

severalangularly disposed faces 66 of. the

innerwall are made parts of, an integral shell, and theidoor (i7-Iisheld1-in placeby means ;iofaeclamping screw 68 that is-,-. thread: 1

ed through ayoke 6:9 fixed to end castings 70 between which the barrel is confined. T'he said smaller barrel may be used as alsample mill, and it is actuated simultaneously with thelarger. mill and; is disposed intaxial alignment-therewith. ,In the present inv stance, thefsample mil-lbarrel {has the -form ofa jar, Whose axislisjhorizontal, one end wall 65" of whichis integral with the sur; rounding Wall, and the other ,end- Wall '65? in thev rebated, open end of; said jar." I The parts are held together. zbet weenlthe metal 1 heads or spiders and tiebolts shown, and the'hubbedlhead or spider may be readily} removed from .theshaft, 35,-

In the construotion: shown theslabs or staveslli are confined by'asolid cylind nicr metal shell 7,2;. that1is to, say, a shell which extends, from. end to endof the:

V 'be ing made apart separate-from and fitted) impact elements, the doors are fitted place barreL asidistinguished from spaced hoops; and the vvoids betweenisaid shell and, the

outer faces of the slabsor staves intermes diate lthe outer anglesot; the stares or slabs are filled with bonding bodies 73 of cement -tures, the reinforcing element thereof com: I prising-theenmeshecl screencyllnder .76. V 5

851" V crushingthepartition,as- -by a sledge ham- V I In the construction shownin Figure 9, the slabs or staves 11 are held together by a plurality of plates 77 which extend lengthwise of the staves and are coextensive in width therewith. v V

They are formed-at their side margins with flanges 79 which meet in planes parallel to the meeting faces of the sideedges of said slabs or staves, and the plates are joined together'by clamping boltsor rivets '80 that pierce saidvfiangesa In this latter construction the key elements 81 which enterregistering-grooves in and lock the said staves or slabs together at their juncture may be fastened to these flangedplates by the bolts'or rivets 80. The plates 77 are spaced from the slabs or staves and the voids are filled with bonding bodies 82' of cement or the like. I I

In the construction shown in'Figures 7 and 9, the stavesor slabs may be assembled upright and held together by any suit-" able means while the cylinder 72 of the barrel shown in Figure v7 is'placed thereover,-or while the'plates' 77 of the construction shown in Figure 9 are bolted around the assembled staves or slabs or placed over the assembled slabs in one as-' sembled polygonal barrel form and the pe barrel and contents and the span of the. slabs or staves, the top staves offering an. arched support for the lower staves'and the contained load of. the barrel.

, In Figure 10 the barrel 80 is 'inade ofa single or integral part, the inner angularly disposed faces 81 of which produce a: wall that is polygonal in cross section.

In all the constructions shown in Figures 7 to 10, inclusive, any 'suitablefformfof charging and dischargingdoors may be employed, preferably follow ingjalong the general arrangement shown in Figures 1 to 6. inclusive. 7 the door structures have been omitted from said Figures 7 to 10, inclusive;

I claim as my invention: 1. A mill for pulverizing enamel stock and the like comprising a rotative barrel formed with end walls and acir cumferential wall of internal polygonal cross section, with the segments meeting at angles of from 90 to 135 degrees, all made of vitrev ous porcelain, the circumferential wall be} mg continuous from end to end and joined For sake of clearness. however,

to the end wall :by internal dry joints, said circumferential wall being made of solid vitreous porcelain sta'ves and being joined along integralbeveled edges by internal dry joints to produce the angle specified and means exterior to the internal faces of the joints between the-beveled edges of said,

staves and between the end Walls to hold the barrel .members rigidly together, 2. A crushing or pulverizing mill for rel having end walls and an enclosing wall each composed of solid vitreous porcelain, the enclosing wall being made of solid vitre ous porcelain staves extending from end wall to end wall and there joined to the end walls by interiordry joints and the staves being joined along beveled edges to. produce internal dry joints and angularly disposed crushing faces. in 'cross section, said enclosing wall bemg provided wlth a door opening, a solid vitreous porcelainq 'door closing-said opening and having '1n-' wardly beveled edges to fit corresponding edges of the solid staves, and .confining' means wholly exterior to the inner slde of the barrel to hold the door in place and the staves assembled to formthe enclosing wall V enamel stock and the like comprising ailoarslv and to confine said wall on the end walls. J

3. A crushing or pulverizing mill for tive barrel havin" solid vitreous porcelain enclosing and en walls, with the end walls fitted to and interlocke'd with the ends'of' thefenclosing wa'll to present vitreous porcei lain walls only to the interior of thebarrel, metal plates fitted outside of said end walls.

means outside the barrel" for drawing said plates together'and against said barrel end walls to thereby hold-the barrel parts assembled, and supporting and driving trunnions fixedly connected to said end metal plates.

41A crushing or piilverizing mill for enamel'stock and the like comprising a rota-- tive barrel having-[solid vitreous porcelain enclosing and end walls, with the end walls fitted within rebated portion of and inter- Y locked to theends of the enclosing'wall. and with'the enclosing wallmade of solid staves joinedalong interior dry joints and at angles to each other, metaljplates'fitted outside said end walls, tie rods exterior to the barrel and'eX tending between said end plates for clamping said plates on said end walls and the latter on the ends of the enclosing walls, and supporting and driving trunnions fixed to said: metal end plates. 5. A crushing or pulverizin'g mill 'for enamel stock and the like comprisinga barjrel having solid'vitreousporcelain enclosing and end walls and fitted into and inter locked with thezends of the enclosing wall; to present vitreous porcelain walls only to the interior of the barrel, metal plates fitted enamel stock and the like comprising arota between'said plates to clamp said end walls against said end walls, means extending on the enclosing wall,,and cushioning-means between said plate and said end walls, said endwwalls each having a central opening, and the metal plates having driving hubs which extend within said openings and are'bonded to said end walls and vitreous porcelain neans to interlock said hubs to said end walls and to'cover said hubs from contact with the contents of the barrel.

6, A crushing or pulverizing mill for enamel stock and the like comprising a barrel having solid vitreous porcelain enclosing-and end walls and fitted into-and interlocked with the ends of the enclosing wall to present vitreous porcelain walls "only to the interior of the barrel, metal plates fitted against said end walls, means extending between said plates to clampsaidend walls on the enclosing wall, said end walls having central openings, and the metal'plates having driving hubs which extend within Stiltl" openings and are bonded'to said end walls, and vitreous'porcelain means to interlock said hubs to said end walls and to cover, said hubs from contact with the contents of the barrel j 7. A crushing or pulverizing mill for enamel stock and the'like comprising a barrel having solid vitreous porcelain enclosing and end walls and fitted into and interlocked with the ends of the enclosing-wall, metal plates titted against said end walls, means extending between said plates to clamp said end walls on the enclosing wall, and cushioning means between said plates and said end walls, said end walls having central openings, and the metal plateshaving hollow hubs which extend within said central openings and are bonded to said end walls, and vitreous porcelain plugs fitted within said hollow hubs from within the barrel and bonded to said hubs and provided with flanges which overlap said central openings radially exterior to said hubs. V

8. A crushing or pulverizing mill for enamel stock and the like comprising a barrel having vitreous porcelain circumteren; tial shell and end walls, the latter fitted to and interlocked with the ends of the circumterential shell, metal plates fitted outside said end walls, with means exterior tothe barrel for clamping said plates together to thereby hold the barrel parts assembled, said vitreous porcelain end walls having cen tral openings, and the metallic end plates having hubs which extend within said open lugs and are bonded to said end walls, means to interlock said hubs to said vitreous porcelain end walls and to cover the inner ends 7 driving and supporting shafts connected to said end plates.

the enamel, metal plates fitted outside *end nv'alls'; with means for Qclainpingsaid plates together. to tliei' ebj, -'liold.tlie barrel" hollow hubs, that extent.

staves dry.

9. Iii a crushing or pulverizing mill-for enamel and like stock, a barrel having its circumferential wall coni'posectwholly of vitreous porcelain and its end walls made of like material, metallicplates" titted to said end walls, "with meaiis exterior to saidcircumferentialwall for elamp)ing said plates thereonQand resilient cushions between said plates and the said end walls'to accommo ential shell and end walls made of like ma terial and 'litted and interlocked to the ends of the circumferential wall to.produce continuous inwardly facing surfaces neutral'tosaid parts assembled said metal blates havin A 7 I p L V 33 into said openings and rare exteriorly bonded to said end walls,

staves fitted together at angles in matched 7 self supporting relation to produceat the with said hubs and the and flanged porcelain plugs iiiserted intothe hollow hubs from within sa d barrels,

inner surface of the wall dry joints, and

means in the'angles of said stavesexterior to said joints and-inwardly beyond the outer side of the mill tolock said staves together.

12. A crushing mill for enamel stock and the like comprising a barrel having its circuniferential and end walls made whollyot solid vitreous porcelain, said circumferential wall composed of a plurality of mutually supporting, solid longitudinal staves disposed at angles to each othen to constitute an interior polygonal cross section barrel with the inter or joints between the 18. A crushing mill forenaniel stock and the like comprising a horizontally rotative barrel having interlocked solid vitreous porcelain end and circumferential walls, the

latter comprising longitudinal staves which meet along their side edges at'angles to self support each other and to produce a' barrel of interior polygonal cross section, the ends of said staves being inset or rehated to receive the end walls, plates applied to said end walls, exterior clamping means staves and hubs on said plates interlocked to said end Walls.

14. A crushing mill for enamel steel: and the like comprising a horizontally rotative barrel having interlocked solid vitreous porcelain end and circumferential Walls, the latter comprising longitudinal staves which meet along their side edges at angles to produce a barrel of interior polygonal cross section, the'edge faces of said staves being joined at the inner side of the barrel by dry joints, and locking means between said stave edges radially exterior to said dry joints.

15. A crushing mill for enamel stock and the like comprising a horizontally rotative barrel having interlocked solid vitreous porcelain end and circumferential Walls, the latter comprising longitudinal staves which meet along their side edges at angles to mutually support each other and to produce a barrel of interiorpolygonal cross section,

the edge faces of said staves being joined atthe inner side of the barrel by dry joints, and said meeting faces of the staves radially exterior to said dry joints having longitudinal registering recesses, and locking members in said recesses bonded to said staves. V I

16. A grinding and crushing mill for enamel, stock comprising a rotative barrel comprising vitreous porcelain heads and an enclosing Wall made of solid staves of the same material extending continuously from head to head and joined thereto by dry joints, said staves meeting at their'side' margins along beveled faces to produce closed, internal, dry joints produced Wholly by the material of the staves, and means between adjacent staves externallyjrad ial to said internal dry joints, and Within the same material extending continuously from head to head and joined thereto by dry oints said staves meeting at their side margins along beveled faces to produce closed,

internal, dry joints produced Wholly by the materialot the staves, means to confine said heads on the ends of the staves and circumferential binding means to-hold the staves together along their beveled faces.

In Witness whereof I claim the foregoing as my invention, I hereunto append my signature this 20th day of January, 1920.

' FRANKLIN H; XVOLEVER. 

